Paper-comminuting machine.



F. GfiETTLBR.

PAPER GOMMINUTING MACHINE. APPLICATION FILED MAR. 6, 1912.

Patented Mar. 24, 19M

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W 3 v y F. GfiETTLER.

PAPER UOMMINUTING MACHINE.

APPLIOATION FILED MAB. 6, 1:91}.

4 1 9 1 4 2 r a M. d

n e M P nm T E B E H T B H B 2 n 1| u I! III Inventor Frwz iietticr ion;

Fmrzefinrrnnn, or FnANKroRT-oN-rnE-MAIN, GERMANY.

iPAPER-COMMINUTING MACHINE.

To all whom itmag concern: 4

Be it known that I, FRITZ GiiETTLER, a subject of the King of Prussia, residing at Frankfort-on-the-Main, in Germany, have or tear it into small pieces which are too short to enable paper of good quality to be manufactured again therefrom.

The object of the p'resent invention is to provide a machine adapted to commin'ute waste manuscript and printed matter in such a manner that the particles are suitable for use in the manufacture of paper of good quality.

Three forms of construction of the improved machine are diagrammatically illustr'ated in the accompanying drawing, in

Figures 1 and 2 are respectively a plan View and a side elevation of the cutting and tearing rolls used in one form of the machine, Fig. 3 being side elevation of the .machine, with part of the casing broken away. Fig. 4 is a front elevation of another form of construction, Fig. 5 being a sideview, and Fig. 6 a detail thereof. Figs. 7 to 10 illustrate the third form of construction, Fig. '7 being a side view of a pair of cutting rolls, Fig. 8, a front view of one of these rolls with the device for guiding the paper, Fig. 9 a side view of the entire series of rolls, and Fig. 10 a side view of the actuating gear.

The machine shown in Figs. 1 to 3, comprises a crank a which'can be operated by hand or power and actuates two rolls 6 and c which rotatein opposite directions. and be tween which the waste paper to be destroyed is passed. These rolls out the paper into strips by means of flat rimmed sharp edged ribs d 13 ,03 etc., the rolls being so set that the ribs on each of them enter the grooves between the ribs on the other. The ribs may be toothed or milled. The strips of paper are guided by combs e and f so that they pass between another pair of rolls Specificationof Letters'I atent. a 1ieaaenn1edmmh 6,1912. Serial No.

'to 10, the cutting rolls b 0 rubber rolls to a: rotating Patented Mar. 2a, ioia, 681,951.

and closeto, the g and it being driven by toothed gear and having throughout their width.

9, it arranged underneath rolls 6 c, the rolls means of suitable teeth extending The rolls 9 and speed; than the upper rolls 6, 0, so that the strips of paper are torn into pieces. In order to m1- x up the pieces and prevent them from clinging together, a rotary beater z is arranged below the rolls g, 72,.

Theconstruction shown in Figs. 4 to 6 comprlses a shearing device 0 which first cuts the waste paper into strips. .These strips drop between two cutting rolls 6} and 0 the I'lbS of which mesh with each other .and cut the strips transversely into small pieces equal in length to'the width of the grooves between the ribs. The paper to be cut is fed to the shears from a table m by means of an intermittently acting feed device n, which pushes it forward step by step, each time the shears open, the shearing de vice being actuated by acrank p and connecting rod 9. A bell' crank r for actuating the feed device is struck at t by the ascending blade 8 of the shearing device 0, so that it are driven at a higher the feed fingers n n etc., move in the direction indicated by the arrow in Fig. 6, and push the paper along the table, the fingers being pulled back by springs m when the blade 8 descends, and then sliding idly over the paper, by reason of their inclined position.

In the construction shown in Figs. 7

work at opposite sides of two guide plates e f having apertures 21 for the milled cutting ribs d 03, at, as shown in Fig. 8. The plates afford guidance to the paper during its passage between the rolls, and prevent the paper from being pressed too deeply into the grooves between the ribs. The paper out. into strips by the rolls b 0 passes downward between two rolls 9 k (Fig. 9), which mayconsist of rubber with metal cores, and which rotate at the same speed as the cutting rolls. Beneath these rolls g 7L2, but set somewhat aside, there is a'pair of at a higher speed so that they tear the strips to pieces. Fig. 10 shows the driving gear for the three pairs of rolls. wheels 2 2 2 a, and 2 2", are fixed to the respective rolls, and toothed wheels 2 and a transmit the drive from the first pair of rolls to the second, and from the second to.

Three pairs of to hed the third, the drive from the wheel e" to the wheel 2 taln'ng place through a pinion so that the rolls w and a are driven at a higher speed. The rubber rolls do not allow the paper to slip, and the lateral arrangement of the rolls w a: increasesthe adhesion of the. paper, since it increases the frictional surface between the rolls and paper.. a

What I claim as my invention and desire to secure by Letters Patent of the United States is t 1. A comminuting machine embodying a pair of coacting cutting rolls for cutting the material operated on into strips, a pair of coacting tearing rolls for dividing said\ strips into short lengths, and means for actuating both pairs of rolls at such relative speeds that the circumferential speed of the pair of tearing rolls exceeds that of the cutting rolls.

2. In a paper comminuting machine, the combination of a pair of paper slitting rolls and tearing rolls for receiving the slitted paper and operating at a greater peripheral speed than the slitting rolls whereby sufiicient tension is placed upon the slitted paper to tear the same into short lengths.

3. A paper comminuting machine embodying in combination apair of coacting cutting rolls having a plurality of flat "rimmed circular ribs extending circumferentially around the rolls in planes transversely of the axes of said rolls, said rolls being so positioned that the ribs of the two rolls mesh with one another, a pair of coacting tearing rolls, means intermediate the cutting and tearing rolls whereby paper out In witness whereo into strips by said cuttingrolls is fed to said tearing rolls, and means tor actuating said cuttlng and tearing rolls so that the circumferentlal speed of the tearing rolls exceeds that of the cutting rolls.

, 4. A paper comminuting machine embodying a pair of coacting cutting rolls having a plurality of flat rimmed circular ribs extending circumferentially around the rolls in planes transversely of the axes of said rolls,

said rolls being so positioned thatthe ribs 10f the two rolls mesh with one another, two

guide plates spaced apart and arranged be tween said cutting rolls, saidplates having apertures for the ribs of said cutting rolls, a pair of coacting tearing rolls, means intermediate the cutting and tearing rolls whereby paper cut into strips by said cutting rolls is fed to said tearing lrolls, and means for actuatin said cutting and tearing rolls so thatthe circumferential speed of the tear ing rolls exceeds that of the cuttin rolls.

5. In a paper comminuting mac ine, the

combination of paper feeding mechanism, cutting rolls for cutting the paper 1nto strips, rolls for dividing the"cut strips into short lengths, said dividirig rolls operating at a greater speed than the cutting rolls, and means for guiding the paper from the cutting rolls to the dividing rolls.

specification in the presence of two witnesses.

\ rfnrrz GUETTLER.

Witnesses: i v I JEAN GRUND, i CARL GRUND.

I have signed this 

